<template>
    <el-row :gutter="40" class="panel-group">
      <el-col :xs="12" :sm="12" :lg="6" class="card-panel-col">
        <div class="card-panel" @click="navigator('/student/index')">
          <div class="card-panel-icon-wrapper icon-people"><svg-icon icon-class="peoples" class-name="card-panel-icon" /></div>
          <div class="card-panel-description">
            <div class="card-panel-text">学员人数</div>
            <count-to :start-val="0" :end-val="student" :duration="2600" class="card-panel-num" />
          </div>
        </div>
      </el-col>
      <el-col :xs="12" :sm="12" :lg="6" class="card-panel-col">
        <div class="card-panel" @click="navigator('/student/course')">
          <div class="card-panel-icon-wrapper icon-message"><svg-icon icon-class="money" class-name="card-panel-icon" /></div>
          <div class="card-panel-description">
            <div class="card-panel-text">总收入</div>
            <count-to :start-val="0" :end-val="income" :duration="3000" class="card-panel-num" />
          </div>
        </div>
      </el-col>
      <el-col :xs="12" :sm="12" :lg="6" class="card-panel-col">
        <div class="card-panel" @click="navigator('/student/course')">
          <div class="card-panel-icon-wrapper icon-money"><svg-icon icon-class="excel" class-name="card-panel-icon" /></div>
          <div class="card-panel-description">
            <div class="card-panel-text">总课时</div>
            <count-to :start-val="0" :end-val="course" :duration="3200" class="card-panel-num" />
          </div>
        </div>
      </el-col>
      <el-col :xs="12" :sm="12" :lg="6" class="card-panel-col">
        <div class="card-panel" @click="navigator('/student/course')">
          <div class="card-panel-icon-wrapper icon-shopping"><svg-icon icon-class="shopping" class-name="card-panel-icon" /></div>
          <div class="card-panel-description">
            <div class="card-panel-text">订单总量</div>
            <count-to :start-val="0" :end-val="order" :duration="3600" class="card-panel-num" />
          </div>
        </div>
      </el-col>
    </el-row>
  </template>

  <script>
  import CountTo from 'vue-count-to'
  import countApi from '@/api/count'

  export default {
    name: 'CountData',
    components: {
      CountTo
    },
    data() {
      return {
        student: 0,
        income: 0,
        course: 0,
        order: 0
      }
    },
    mounted() {
      countApi.total().then(res => {
        this.student = res.data.student
        this.income = res.data.income
        this.course = res.data.course
        this.order = res.data.order
      })
    },
    methods: {
      navigator(path) {
        this.$router.push(path)
      }
    }
  }
  </script>

  <style lang="scss" scoped>
  .panel-group {
    margin-top: 18px;

    .card-panel-col {
      margin-bottom: 32px;
    }
    .card-panel {
      height: 108px;
      cursor: pointer;
      font-size: 12px;
      position: relative;
      overflow: hidden;
      color: #666;
      background: #fff;
      box-shadow: 4px 4px 40px rgba(0, 0, 0, .05);
      border-color: rgba(0, 0, 0, .05);
      &:hover {
        .card-panel-icon-wrapper {
          color: #fff;
        }
        .icon-people {
          background: #40c9c6;
        }
        .icon-message {
          background: #36a3f7;
        }
        .icon-money {
          background: #f4516c;
        }
        .icon-shopping {
          background: #34bfa3
        }
      }
      .icon-people {
        color: #40c9c6;
      }
      .icon-message {
        color: #36a3f7;
      }
      .icon-money {
        color: #f4516c;
      }
      .icon-shopping {
        color: #34bfa3
      }

      .card-panel-icon-wrapper {
        float: left;
        margin: 14px 0 0 14px;
        padding: 16px;
        transition: all 0.38s ease-out;
        border-radius: 6px;
      }

      .card-panel-icon {
        float: left;
        font-size: 48px;
      }

      .card-panel-description {
        float: right;
        font-weight: bold;
        margin: 26px;
        margin-left: 0px;

        .card-panel-text {
          line-height: 18px;
          color: rgba(0, 0, 0, 0.45);
          font-size: 16px;
          margin-bottom: 12px;
        }

        .card-panel-num {
          font-size: 20px;
        }
      }
    }
  }

  @media (max-width:550px) {
    .card-panel-description {
      display: none;
    }

    .card-panel-icon-wrapper {
      float: none !important;
      width: 100%;
      height: 100%;
      margin: 0 !important;
      .svg-icon {
        display: block;
        margin: 14px auto !important;
        float: none !important;
      }
    }
  }
  </style>
